package com.mmallbe.util;

import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Slf4j
public class CookieUtil {

    private final static String COOKIE_DOMAIN = ".happymmall.com";
    private final static String COOKIE_NAME = "mmall_login_token";


    public static String readLoginToken(HttpServletRequest request){
        Cookie[] cks = request.getCookies();
        if(cks != null){
            for(Cookie ck :cks){
                log.info("read cookieName :{} ,cookieValue:{}",ck.getName(),ck.getValue());
                if(StringUtils.equals(ck.getName(),COOKIE_NAME)){
                    log.info("return cookieName:{},cookieValue:{}",ck.getName(),ck.getValue());
                    return ck.getValue();
                }
            }
        }
        return null;
    }

    //Domain与path之间的关系
    //X:domain=".happymmall.com"  //同级之间相互拿不到对方Cookie
    //a:A.happymmall.com            cookie:domain=A.happymmall.com;path="/"
    //b:B.happymmall.com            cookie:domain=B.happymmall.com;path="/"
    //c:A.happymmall.com/test/cc    cookie:domain=A.happymmall.com;path="/test/cc"
    //d:A.happymmall.com/test/dd    cookie:domain=A.happymmall.com;path="/test/dd"
    //e:A.happymmall.com/test       cookie:domain=A.happymmall.com;path="/test"


    public static void writeLoginToken(HttpServletResponse response,String token){
        Cookie ck = new Cookie(COOKIE_NAME, token);
        ck.setDomain(COOKIE_DOMAIN);
        ck.setPath("/");//代表设置在根目录下
        ck.setHttpOnly(true);//防止脚本攻击带来的消息泄露风险，禁止通过脚本获取cookie信息
        //单位是秒
        // 如果这个maxage不设置的话，cookie就不会写入硬盘，而是写在内存。只在当前页面有效。
        ck.setMaxAge(60 * 60 * 24 * 365);//如果设置为-1 ，代表永久
        log.info("write cookieName:{},cookieValue:{} ",ck.getName(),ck.getValue());
        response.addCookie(ck);
    }

    public static void delLoginToken(HttpServletRequest request,HttpServletResponse response){
        Cookie[] cks = request.getCookies();
        if(cks != null){
            for(Cookie ck :cks){
                if(StringUtils.equals(ck.getName(),COOKIE_NAME)){
                    ck.setDomain(COOKIE_DOMAIN);
                    ck.setPath("/");
                    ck.setMaxAge(0); //设置为0，代表删除此cookie
                    log.info("del cookieName:{} ,cookieValue:{}",ck.getName(),ck.getValue());
                    response.addCookie(ck);
                    return;
                }
            }
        }
    }

}
